Gun



FIG. 1 is a front elevation view of the gun showing my design.

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a rear perspective view thereof; and,

FIG. 4 is a front perspective view thereof.

The broken line showing is included for the purpose of illustration and forms no part of the claimed design. 

CLAIM The ornamental design for a gun, as shown and described. 